body{
    background-color: rgb(240,242,248);
}
.top{
    height: 100px;
    width: 100%;
    background-color: rgb(153, 153, 153);
}
.top_one{
    font-size: 40px;
    text-align: center;
    line-height: 100px;
    margin: 0 auto;
    color: rgb(255, 244, 216);
}
.nav{
    margin-top: 10%;
    width: 250px;
    height: 200px;
    background-color: white;
    border-radius: 10px;
}
.nav_one{
    width: 200px;
    border-bottom: #0fb4a0 1px solid;
    text-align: center;
    height: 60px;
    line-height: 60px;
    margin: 0 auto;
    font-size: 20px;
}
.nav_two{
    height: 140px;
    line-height: 140px;
    text-align: center;
    margin: 0 auto;
    font-size: 70px;
}
.tjt{
    width: 100%;
    height: 400px;
    margin-top: 5%;
}